fix: preserve search history

[samarthchawla2005]

📝 Description

1. Overall changes

• Search history is now saved only when you actually mean to search, not while typing.
• Typing in the search box now just shows results, but does not save anything.
• Searches are saved when you:
  • Press Enter
  • Click a suggestion
  • Leave the search box (blur)

2. Recent searches improvements

• Added a “Clear All” button at the top of recent searches.
• You can now delete all recent searches in one click.

3. Clear All Search Pop-Up

• Formed a custom popup based on website design to Clear All searches.
• If the custom popup is not available, it still falls back to the default browser confirm.

Behavior changes

• Recent searches are now cleaner and more meaningful (no partial words like “a”, “ap”, etc.).
• Search feels smoother because it doesn’t constantly save while typing.
• Overall interaction is more intentional and user-friendly.

🔗 Linked Issue

Closes #847

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📋 Contribution Checklist

• My code strictly adheres to the project guidelines (Standard library only, procedural code, clean spacing).
• I have verified that my files are placed in the correct directory.
• I have tested my changes thoroughly on my local machine.
• I have included interactive emojis and clean console/UI outputs.
• GSSoC 2026: I have been formally assigned to this issue and noted it above.

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